{
  "equation": "u_t + 6 u u_x + u_xxx = 0",
  "kappas": [1.0, 0.5],
  "phase_convention": "x_j = log(A)/(4*kappa_j)",
  "initial_time": -4.0,
  "final_time": 4.0,
  "checkpoint_times": [-4.0, -3.0, -2.0, -1.0, 0.0, 1.0, 2.0, 3.0, 4.0],
  "temporal": {"length": 80.0, "points": 768, "steps": [6400, 12800, 25600, 51200]},
  "spatial": {"length": 80.0, "points": [128, 192, 256, 384, 512, 768], "steps": 12800},
  "domain": {"lengths": [40.0, 48.0, 64.0, 80.0], "spacing": 0.125, "steps": 12800},
  "reference": {"length": 80.0, "points": 768, "steps": 51200},
  "asymptotic_times": [2.0, 3.0, 4.0, 6.0],
  "saved_comparison": {"absolute_tolerance": 3e-10, "relative_tolerance": 2e-5}
}